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  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-1

    Unit 800700

    Wearing Surfaces

    00700 Roadwork

    Safety Edge (738 Special Provisions)

    Asphalt Concrete Pavement (ACP) (745)

    Miscellaneous ACP Structures (749)

    Miscellaneous PCC Structures (759)

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-2

    Unit 8 Topics:

    Safety edge (Special Provision)

    Basics of Asphalt Concrete Pavement (ACP)

    ACP measurement and payment

    Construction of miscellaneous ACP structures

    Construction of miscellaneous PCC structures

    00738 Safety Edge

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-3

    00745 ACP Statistically Accepted

    Job Mix Formula (JMF)

    Sublot 1000 tons

    Wearing course is thetop lift of ACP,regardless of thickness

    ACP Job Mix Formula

    ODOT lab report Mixing and compaction

    temperatures ranges Design theoretical

    maximum specific gravity(Gmm)

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-4

    Expectations of Paving Inspectors

    Lay out expectations atpre-paving meeting Point out problems while

    they are occurring, notafter the fact Work with Contractor

    to resolve problems

  • 8-5

  • 8-6

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-7

    Paving around Existing Guardrail

    Standard Drawing RD400 Pave to the edge of post Compact under guardrail Modified paving

    extension

    Ticket Taker Responsibilities(if you have them)

    Document location andtime of placed material Yield calculations Check for overloads Monitor temperature Be safe

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-8

    In-Place Air Voids (Compaction)Keys to Performance

  • Page of

    PROJECT CONTRACT

    DATE SOURCE

    BID ITEM MATERIAL

    LOAD # TICKET #

    QUANTITY

    DELIVERED

    LOCATION

    PLACED

    TIME

    DELIVERED

    12345678910

    (A) Total 0.00

    WIDTH (Feet) LENGTH (Feet) DEPTH (Inches) MAMD % COMPACTION

    0.00#VALUE!#VALUE! #VALUE!

    Inspected by (Print Name) Inspected by (Signature)

    Checked by (Signature)

    Quantity This Note Pay Unit

    Estimate Number Note No.

    734-2792 (06-2015) http://www.oregon.gov/ODOT/HWY/CONSTRUCTION/HwyConstForms1.shtml

    Date

    MATERIAL DELIVERY

    * Initial here if yield calculations are not

    applicable due to irregular areas or lack of

    consistent placement

    % Tolerance (D)

    DateChecked by (Print Name)

    Comparison (C)

    Ten Load Yield (A)Theoretical Tons (B)

    OFFICE USE ONLY

    MATERIAL DELIVERY & YIELD CHECK SHEET

    (B) THEORETICAL YIELD CALC: (Width x Length x (Depth/12) x (MAMD * %Comp./100) / 2000) = TONS

    (C) COMPARISON CALC: (A/B) X 100 (D) % TOLERANCE CALC: (100-C) (must be within +/- 10% tolerance)

    0.00THEORETICAL TONS

    REMARKS

    Quality Checked

    Quantity Checked

    8-9

  • Page of

    PROJECT CONTRACT

    DATE SOURCE

    BID ITEM MATERIAL

    LOAD # TICKET #

    QUANTITY

    DELIVERED

    LOCATION

    PLACED

    TIME

    DELIVERED

    11121314151617181920

    Subtotal 0.00

    Running Total

    LOAD # TICKET #QUANTITY

    DELIVERED

    LOCATION

    PLACED

    TIME

    DELIVERED

    21222324252627282930

    Subtotal 0.00

    734-2792 (06-2015) http://www.oregon.gov/ODOT/HWY/CONSTRUCTION/HwyConstForms1.shtml

    MATERIAL DELIVERY & YIELD CHECK SHEET

    Running Total

    REMARKS

    REMARKS

    8-10

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-11

    Importance of Compaction

    Improves mechanicalstability Improves resistance to

    permanent deformation Reduces moisture

    penetration Improves fatigue

    resistance Reduces low-

    temperature crackingpotential

    ACP Longitudinal Joints

    Offset joints by at least6 inches For wear course, place

    at lane lines or fog lines(will require surveyif layout is complex) Construct tight, even,

    and straight joints

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-12

    00745 ACP Measurement and Payment

    Weigh Memo (Ticket) Tally sheet Location of material Certified scale Check weight Document all rejected material

    00749 Miscellaneous ACP Structures

    Road approaches Street connections Driveways Guardrail flares

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-13

    00749 Miscellaneous ACP Structures

    Furnish Level 2, " ACPunless otherwise shown Construct to 1 inch of

    true line Method compaction

    specification Surface smoothness

    shall not vary more than inch form 12-footstraightedge

    ACP Structures Measurement and Payment

    Measurement Method A (Weight

    and extra basis) Method B (Complete

    in place basis)

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-14

    00759 Miscellaneous PCC Structures

    Curb and gutters Islands Driveways Sidewalks

    00759 Miscellaneous PCC Structures

    Commercial Grade ConcreteConstruct to established line and make firm and free of all unsuitable material

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-15

    00759 Miscellaneous PCC Structures

    Joint locations critical Grade control

    Check ramps for ADAcompliance aftercompletion using RampInspection Form

    00759 Miscellaneous PCC StructuresCuring and Testing

    Keep public traffic off fresh concrete for at least 7 calendar days

    Surface shall not vary more than inch from edge when tested with a 12-foot straightedge

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-16

    00759 Miscellaneous PCC Structures

    00759.80 Measurement 00759.90 Payment Volume and area basis

    will be limited to neatlines Length along the face of

    structure, including curbtapers or depressedlengths at driveways andramps

    Key Inspection Points:

    Note when paver stops or rollers are not running

    Be proactive with pavingcontact resources (PQME)if issues arise

    Pay attention to joints (longitudinal and transverse)

    QCT and visual acceptance of CGC

    Verify lines and grades prior to placing concrete

    Pay attention to ADA ramps

    This is not an exhaustive review of ACPtake HMAC class

  • General Construction Inspector December 2017

    00700 Wearing Surfaces 8-17

    Unit 8 Review:

    Safety edge (Special Provision)

    Asphalt Concrete Pavement (ACP)

    ACP measurement and payment

    Construction of Miscellaneous ACP structures

    Construction of Miscellaneous PCC Structures

  • 8-18

  • Spec Notes & Best Practices

    June 2015 Number 4

    00730 Emulsified Asphalt Tack Coat

    Tack BondingUltimate Goal To produce uniform, complete, and adequate tack coverage to bond asphalt pavements to better resist shear stresses.

    Section 00730.11 Dilution of tack coat material (adding additional water) may be allowed up to a maximum 1:1 ratio with Engineer approval.

    Poorly Bonded Asphalt Pavements Reduce fatigue life 10% bond loss = approximate 50% less

    fatigue life No bond = approximate 60 to 75% loss of

    pavement life Increase slippage and shoving Canbedifficulttocompact

    Resources 2015OregonStandardSpecificationsfor

    Construction ODOTHMACInspectorCertificationManual

    http://www.oregon.gov/ODOT/HWY/ Best Practices for Emulsion Tack Coats, NAPA

    2013

    Technical ContactLarry Ilg, Pavement Quality & Materials Engineer503-986-3072larry.d.ilg@odot.state.or.us

    Tack Dilution Advantages and DisadvantagesAdvantage Easier to provide a uniform coverage Less Likely to plug nozzles Diluted tack may track less

    Disadvantages May take longer for tack to break (water and asphalt separate) May be prone to run-off Difficulttomeasureandconfirmrate

    May need ODOT lab test for dilution rate Difficulttocalculateundilutedasphaltemulsionforpayment

    Distributor Checklist Adequatedistributorpressureforeventackflow Application rate (calculate for proper residual rate) Temperature of emulsion

    Asphalt emulsions typically 130 to 160 F PG type asphalt binder typically 350 to 400 F

    Bar height (ensure triple coverage) Correctlysizednozzlecleanandfree-flowing Nozzle angle setting 15 to 30 degrees Continued on back

    ( )

    *If tack coat is applied to newly paved ACP surface the residual rate may be reduced to 0.02gallons/square yard.

    0.06 to 0.12

    0.12 to 0.18

    8-19

  • Controls to Minimize Tracking of Emulsified Tack Minimizeconstructionvehicletrafficespeciallywhentackis

    breaking Prior to tack application, make sure all surfaces are clean

    especially with grinding operations Apply evenly across surface Dilute asphalt emulsions Use alternate approved asphalt emulsion (CSS-1H) Contact the asphalt emulsion supplier for other methods

    Asphalt Emulsion (Tack) Breaking and Setting Look for the color to change: brown to black Supplier can adjust tack formulation to increase/decrease set

    time if needed Variables that may affect break time

    Weather (damp weather will delay set time) Uniformity of tack coat (pooled tack will set slower) Type of tack (softer tacks will set slower) Initial temperature of tack (lower tack temperature will

    delay set time) Ambient temperature (cooler temperatures will delay set

    time)

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